Electric bell and annunciator



NOMOaeL l J. D. GILOHRIST.

ELECTRIC BELL AND ANNUNGIATOR. No. 298,080. Patented May 6, 1884.

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PATENT A ELECTRIC BELL AND ANNUNCIATOR.

SPECIFICATION forming part of Letters Patent No. 298,080, dated May 6, 1884-.

Application filed January 15, 1834. (N0 model.)

T0 at whom it may concern.-

Be it known that 1, JOHN D. GILCHRIST, of Ishpeming, in the county of Marquette and State of Michigan, have invented a new and Improved Combined Electric Bell and Annun ciator, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved combined electric bell and annunciator, which shows if the bell has been sounded.

The invention consists in the combination, with an electric bell, of a pointer or dial which is connected with a weighted block, a lever for locking the pointer in place, and of an arm projecting from the armature and adapted to disengage the lockinglever from the weighted block to permit the same to swing the pointer upward to show that the bell has been sounded;

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a face view of my improved com bined electric bell and annunciator, the easing being removed. Fig. 2 is a cross-sectional elevation of the same on the line a; m, Fig. 1-, with the casing in place.

A gong, A, is held on a frame, B, on which an electromagnet, O, is held, and to which frame an armature, D, is pivoted, which is acted on by a spring, the hammer E being secured to the said armature. Ahand or pointer, F, is secured on the outer end of a short shaft, G, held to turn in a plate, H, forming the front of a casing, J, surrounding the mag nets. To the inner end ofthe shaft G a weighted piece or block, K, is fastened, which is pro vided with a shoulder, K; A lever, L, is pivoted to the inner surface of thefront plate, H,

in such a manner that its free lower end can be engaged with the shouldered end of the block K. An arm, M, secured on the armature D, projects toward the lever L. The

block K is parallel with the pointer F. The hand F is placed horizontally, and thereby the lever L automatically engages with the shouldered end of the block and locks the same in position, as shown in Fig. 1. If the magnet connected with the conducting-wires is excited, the armature is attracted, and is swung in the direction of the arrow a, thereby causing the hammer to strike the gong. The arm M is moved with the armature and strikes the lever L and swings the lower end of the same from the shouldered end of the block K, which is thus disengaged andswings down into a vertical position, whereby the pointer F is swung into a horizontal position, and thus shows that the gong has been sounded.

In my improved combined electric bell and annunciator no special magnet is required for operating the annunciator, and the annunciator can be combined with any electric bell at a comparatively small expense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with an electric bell, of a pointer or hand, a weighted block connected with the hand, a lever for locking the weighted. block and hand in place, and an arm projecting from the armature for the purpose of disengaging the locking lever from the weighted block, substantially as herein shown and described.

2. The combination, with an electric bell, of the casing J, having a faceplate, H, the shaft G, held to turn in the face-plate, the hand Fon the outer end of the shaft, the block K, secured on the inner end of the shaft G, and provided with a shoulder, K, the lever L, pivoted to the inner surface of the face-plate H, and of the arm M, secured to the armature- D,substantially as herein shown and described.

JOHN D. GILOHRIST.

W'itnesses:

DUNCAN GILOHRIST, NEIL A. GILOHRIST. 

